I was at death valley over weekend and tried to take some shots of the amazing night sky over there. One thing right off the bat I really once the sun is set is that the extreme hot weather there is causing my GX7 to have unbelievable high amount of noise, it was about 110F around sun set and the temp is still about 100F around 10ish at night. I took a 20sec long exposure without long exposure noise reduction, about half of the photo around the frame is filled with red pix. Here is a sample took with long exposure noise reduction and messing with the noise reduction in LR. Shot is taken at 1600iso and 20sec exposure, as you can see, even after crank the luminace way high before it start to rubbery, the pic still filled with noise and looks grainy. I don't have any identical photo to stack with right now, but I do have some photo taken around the same time frame. What are some of the PP technique or software I can use to reduce the noise further or even before I start post process in LR? Also, for anyone that has experience in shooting under extreme heat, what can be done to at least help to cool off the camera a bit? or we really need a low res high end camera like the A7s? I don't think weather seal actually helps in this situation. The camera body itself is just hot right after I pull it out of my bag. Timelapse or star trail could be very problematic in situation like this. the dark frame are not accurate cuz the temp change quiet rapidly, and you can't really use long exposure NR in those.